High-temperature superconductor fuse

Abstract

The invention discloses a high-temperature superconductor fuse, wherein a high-temperature superconductor fuse body (7) is composed of a YBCO belt material (1), a heavy punch (2), a frame (3), a copper bus bar (4), a copper pressing block (5) and a bolt (6); the copper bus bar (4) and the frame (3) are assembled to a window for fixing the YBCO belt material via the bolt (6); the heavy punch (2) is fixed at the middle part of the YBCO belt material (1), and the end part of at least one YBCO belt material (1) is pressure welded on the copper bus bar (4) on the two sides of the fuse via the copper pressing block (5) and the bolt (6); one end of a current lead wire (8) is connected on the copper bus bar (4), and an insulating sleeve (9) is sleeved thereon; the current lead wire (8) and the high-temperature superconductor fuse body (7) are fixed in a low-temperature container (10), the part situated at the outside of the low-temperature container (10) of the current lead wire (8) is insulated by an insulating terminal (11), and liquid nitrogen is filled in the low-temperature container (10) and is higher than the high-temperature superconductor fuse body (7).

Description

technical field [0001] The invention relates to a fault current fuse, in particular to a short-circuit fault fuse for power transmission and distribution systems. Background technique [0002] At present, in order to adapt to the rapid development of the national economy, the continuous increase of the scale of the power grid and the continuous improvement of the degree of interconnection, my country's power grid is developing in the direction of ultra-large scale. However, the stability problem of my country's power grid has become increasingly serious, and the security and reliability of the power grid are under enormous pressure. Short-circuit faults are one of the serious faults that endanger the safety of power systems and cause huge economic losses. For example, the short-circuit current level of the power grid (especially 220kV and above voltage level) in my country's coastal economically developed areas has approached or even exceeded the maximum allowable level of t...

AI Technical Summary

Problems solved by technology

Resistive high-temperature superconducting current limiter based on the second-generation high-temperature superconducting tape (IEEE Transactions on Applied Superconductivity, vol.19, no.3, 2009, pp1950; IEEE Transactions on Applied Superconductivity, vol.21, no.3 , 2011, pp1206) using the quench resistance current limiting of high temperature superconductors can effectively solve the above problems, but it is still in the research and development stage and requires a large number of high temperature superconductors, which are expensive and complex in structure

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